Year 4 Term 6

Key Concepts – Number – Calculation

• Children understand the importance of place value and therefore add the ones together, then tens, then hundreds and finally thousands.
• Children understand that addition is commutative but subtraction is not.
• Children understand that multiplication is commutative but division is not
• The inverse of addition is subtraction and we can use this to check our answers
• Multiplication is the same as repeated addition
• Subtraction is the same as repeated subtraction
• That when you add one digit numbers together and they total greater than 10, you must exchange this into a ten and put it into the tens column. The same should happen if you have more than 10 tens or more than 10 hundreds.
• Children should be able to look at the calculation and make a decision as to how to calculate the answer. Estimation can help with this.
• Children understand the relationship between multiplication and division and use known fact to calculate the answer.
• Children know that when you multiply by 0, the answer is always 0
• Children know that factors always come in pairs

Key Vocabulary

Total

 Sum

Difference

Division

Divisible

Left over

Remainder

Product

Row

Column

Difference

Exchange

Carry

 Estimate

Inverse

Product

Key Concepts –Topic- measure- Time

• Children understand that you can use your 5 times tables to help you when writing digital time
• Children understand the relationship between AM and PM, and 12 and 24 hours,
• When using 24 hour times, you count in hours from 0-23, and then this resets back to 0.
• Children know that 16:00 and 04:00 are the same time, except one is morning and one is afternoon.

Key Vocabulary

Hours

Minutes

Seconds

Years

Fortnight

Months

Days

Digital

Analogue

Midnight

Noon

Common Misconceptions – Number- Calculation

• Children may not understand the value of each digit and therefore add ones with hundreds etc
• Children confuse the + and x sign when answering questions
• Children believe that both subtraction and division are commutative
• Children believe that estimation is the correct answer, not just a ‘early correct; answer.

Common Misconception – Topic- Measure- Time

• Children will interchange the 60 and 24 and will think there are 24 minutes in an hour or 60 hours in a day
• Children confuse the minutes and second hands when reading the time
• When children are counting durations which go through an hour, they do not change the hour time.
• Children do not understand that once you reach the 23^rd hour, the next hour will be back to 00